RMC is hiring for a Senior Linux System Administrator who will provide Linux based workstation and server support to an RDT&E environment to support our HPC system at Indian Head, MD (Mainside).
The selected applicant will work as part of an integrated team including system administrators, network engineers, software developers, service desk analysts, and other personnel on site.
The applicant must have general experience performing day-to-day administrative tasks related to managing a RedHat Linux based cluster to include storage and networking.
The applicant must have experience creating custom scripts (Bash, Python, Powershell, etc) to assist with administrative and operational management of a RedHat based HPC cluster.
Install, configure, maintain and monitor software applications, operating system, development tools, hardware and storage of the HPC Cluster.
The applicant must have experience with managing a SLURM Workload Manager cluster or other similar job scheduling manager in an HPC cluster.
The applicant must have working knowledge of configuration management tools such as Ansible.
The applicant must have working knowledge of network technology to include IP addressing, VLANS, trunks, LAG, Infiiniband, switch configuration and networking security practices.
The applicant will collaborate with end users and core RDTE staff to provide technical assistance in troubleshooting issues related to the cluster performance and submitted job execution.
The applicant must create and maintain detailed documentation of systems configuration, standard operating procedures (SOP), end user guides and troubleshooting guides.
The applicant must have working knowledge of DISA STIGs to include RedHat STIG and applying them to systems.
The applicant must provide secondary support to core and end user RHEL systems as needed.
The applicant must have working knowledge of storage technology to include NFS, SCSI, SAN/NAS, SMB/CIFS and other protocols to include configuration.
Administered Splunk forwarders and indexers on RHEL/CentOS systems, managing OS-level services, resource tuning, log ingestion pipelines, and secure data flows using TLS and role-based access controls.
Configured and maintained enterprise proxy services (Squid/Apache) and SMTP relays (Postfix/Sendmail) to support outbound system communications, alerting, and automated job notifications across HPC clusters.
Implemented centralized logging for kernel, auditd, syslog, and application logs, integrating with Splunk for real-time monitoring, custom dashboards, and automated alert thresholds to support high-availability operations.

Requirements

6 - 10 years of Linux Administration experience
The selected applicant must have DoD 8570/5239 IAT Level 3 Certification (Security X or CISSP) and the ability to work independently and as part of a team.
The selected applicant must be Red Hat Certified System Administrator (RHCSA) or equivalent.
Linux system administration knowledge.
Working configuration management knowledge with Ansible and/or other enterprise tools.
Working networking technology knowledge.
Working networked storage knowledge.
Working knowledge of DISA STIGs.
Strong troubleshooting and problem-solving skills.
Strong knowledge on enterprise system administration.
Strong experience in DevOPs, Cloud and Container administration.

Benefits

At RMC, we're committed to your career growth!
RMC differentiates itself from other firms through its investment in our employees.
We invest our resources to train, certify, educate, and build our employees.
RMC can offer you a great place to work with a small company feel and give you the experience, tuition assistance, and certifications that will take your career to the next level.
This also includes a competitive paid vacation package with 11 paid federal holidays.
Additionally, we also offer high-quality, low-deductible healthcare plans, pet insurance, and a competitive 401K package.

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Linux AdministrationRedHat LinuxBashPythonPowershellSLURM Workload ManagerAnsibleNFSSCSISAN/NAS

Soft Skills

troubleshootingproblem-solvingteam collaborationindependent work

Certifications

DoD 8570/5239 IAT Level 3 CertificationSecurity XCISSPRed Hat Certified System Administrator (RHCSA)